Torque spec ?, Oh yeah, and Vacuum hose issue. Options

[Bob L.]

1) I have searched around for a torque setting to install new step studs for the exhaust manifold/header. The only setting I can find is from Tunacan.net.

They list - heat exchangers to cylinder head at 16 ftlbs.

Does this apply to installing the stud in the case, the nut on the stud(holding the header) or both?
Any pertinent info would appreciated as well.


2) I'm having trouble matching the vacuum hose diagram to the ports i have on my engine. A '76 2.0. The diagram shows 3 connections at the throttle body.

However, my throttle body only has one connection. I see where one can be eliminated. (IMG:style_emoticons/default/confused24.gif) Is the '76 different? Please advise.

Thanks.

[SLITS]

Your '75 will have only one port on the throttle body and it is connected to the Vacuum Retard on the distributor. Vacuum Advance was not used after '73. There are only two anyway. The blue line you see is from a port on the air cleaner to the De-acceleration valve ... adds extra air for emission control on closed throttle. Your '75, if equipped with the smog pump originally, will have a rectangular fitting to which a tube was fastened.

There is no torque value that I am aware of for installing studs in the heads that I am aware of. Since they are threaded on both ends with a gap in the middle, I run the short threaded end into the boss until it hits the gap.

I do torque the nuts that hold the HEs on to the value specified;

Why studs? Once in, they are less prone to pulling threads out of aluminum (unless over-torqued) than running a threaded fastener(bolt) in and give better clamping force.

My opinion ... the "spurts" can chime in now.